TY  - JOUR
AU  - Pillai, R.
AU  - Wessel, E.
AU  - Nowak, W. J.
AU  - Naumenko, D.
AU  - Quadakkers, W. J.
TI  - Predicting Effect of Base Alloy Composition on Oxidation- and Interdiffusion-Induced Degradation of an MCrAlY Coating
JO  - JOM
VL  - 70
IS  - 8
SN  - 1543-1851
CY  - [S.l.]
PB  - TMS
M1  - FZJ-2018-07261
SP  - 1520 - 1526
PY  - 2018
AB  - The effect of two base alloys, viz. Ni-based superalloy Rene 80 and Co-based alloy ECY768, on the oxidation and interdiffusion behavior of a NiCoCrAlY Re-containing coating after exposure for up to 2000 h at 1050°C in synthetic air has been evaluated. Scanning electron microscopy with energy-dispersive x-ray spectroscopy was employed to measure the element concentrations, and phases were identified by electron backscatter diffraction. Significant depletion of β-NiAl within the coating, enrichment of γ′-phase, and formation of µ-phase in the alloy and Kirkendall porosity at the coating–alloy interface were observed in the coating on Rene 80. In contrast, the coating on the Co-base alloy ECY768 formed large amounts of Cr/Re-rich carbides and the depletion of β-NiAl phase was less pronounced than that observed on the Ni-base alloy. These findings could be interpreted using an in-house-developed thermodynamic–kinetic CALPHAD-based computer model.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000440845900028
DO  - DOI:10.1007/s11837-018-2950-9
UR  - https://juser.fz-juelich.de/record/858375
ER  -